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GTN 725/750 Cockpit Reference Guide (CRG)
190-01007-04 Rev. C
Messages
Message
Description
Action
KNOB STUCK-
Volume knob is stuck in
the pressed position.
The volume knob has
been in a pressed position
for at least 30 seconds.
This knob press will now
be ignored.
Verify the volume knob is
not pressed. Contact dealer
for service if this message
persists.
KNOB STUCK-
Dual concentric inner
knob is stuck in the
pressed position.
The dual concentric
inner knob has been in
a pressed position for
at least 30 seconds. This
knob press will now be
ignored.
Verify the dual concentric
knob is not pressed. Contact
dealer for service if this
message persists.
LOCKED FLIGHT PLAN-
Cannot activate a
fl ight plan containing a
locked waypoint.
The user is trying to
activate a fl ight plan
that contains a locked
waypoint.
Unlock the fl ight plan by
modifying stored fl ight plans
as necessary to include
waypoints, procedures,
and airways that are in the
current navigation database.
LOSS OF INTEGRITY
(LOI)-
Verify GPS position
with other navigation
equipment.
The GPS module has
reported a loss of
integrity.
Use a different GPS receiver
or a non-GPS based source
of navigation. Contact
dealer for service if this
message persists.
MAGNETIC VARIATION-
Aircraft in area with
large mag var. Verify all
course angles.
MagVar is fl agged as
unreliable in the MagVar
database. This normally
occurs when operating at
high latitudes that do not
support a NAV Angle of
Magnetic.
Verify that the geographical
region supports navigation
based on magnetic
variation.
NAV ANGLE-
NAV Angles are
referenced to True
North (°T).
NAV angle is set to True.
No action is necessary;
message is informational
only.
Summary of Contents for GTN 725
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